Sandra Bullock, left, and George Clooney star in the space drama Gravity. ‘We’ve known each other for 20 years, but that doesn’t mean we knew we were going to click on screen,’ says Bullock.Ian Gavan
/ Getty Images

‘My character is this brilliant woman, but her brain is all that she has left,’ says Sandra Bullock, who stars in Gravity.Vittorio Zunino Celotto
/ Getty Images

Sandra Bullock, left, and George Clooney star in the space drama Gravity. ‘We’ve known each other for 20 years, but that doesn’t mean we knew we were going to click on screen,’ says Bullock.Vittorio Zunino Celotto
/ Getty Images

A medical engineer Dr. Ryan Stone (Sandra Bullock) and a veteran astronaut Matt Kowalsky (George Clooney) work together to survive after an accident leaves them adrift in space, stranded in their space suits, drifting dangerously off course and out of communication with Mission Control in Houston.